Protecting-diaphragm for telephone-transmitters.



No. 774,929. PATENTED NOV. 15, 1904. W. M. BASHLIN.

PROTECTING DIAPHRAGM FOR TELEPHONE TRANSMITTER-S. APPLICATION FILED OCT.28, 1903.

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UNITED STATES Patented November 15, 1904.

WILLIAM M. BASHLIN, OF WARREN, PENNSYLVANIA.

PROTECTING-DIAPHRAGM FOR TE' LEPHONE-TRANSMITTERS- SPECIFICATION formingpart of Letters Patent N 0. 774,929, dated November 15, 1904,

' Application filed October 28, 1908. Serial No. 178,953. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM M. BASHLIN, a

citizen of the United States, residing at Warren, in the county ofWarren and State of Pennsylvania, have invented new and usefulImprovements in Protecting-Diaphragms for Telephone-Transmitters, ofwhich the following is a specification.

This invention relates to protecting-diaphragms fortelephone-transmitters; and it consists in certain improvements in theconstruction thereof, as will be hereinafter fully described, andpointed out in the claims.

The invention is illustrated in the accompanying drawings as follows.

Figure 1 shows a side elevation of a telephone-transmitter, part of themouthpiece being broken away to better show construction; Fig. 2, a planView. of the attaching-ring.

A marks the telephone-transmitter; A, the mouthpiece. A diaphragm C issecured over the opening in the mouthpiece by a ring The ring B isprovided with lugs 71, which are bent inwardly for engaging the"edge ofthe mouthpiece. One oiflthe lugs is preferably provided with a screw"&".The ring also has its inner edge crimped in. at '6, so as to draw Thediaphragm C may be made from any suitable material, so

as to make a light sensitive film. It prevents the lodgmentofdisease-germs in the mouthpiece and may be frequently renewed, so asto keep it ina sanitarycondition. ,It;also protects the parts formingthe active elements of the telephone-transmitter, especially from themoisture of the breath.

What I claim as new is- 1. In combination with atelephone-transinitterhaving a mouthpiece; a removable protecting-diaphragmarranged over theopening in the mouthpiece and means forstretchiug and clamping theprotectingdiaphragm about theedge of the mouthpiece.

2. In combination with a telephone-transmitter having a mouthpiece; aring engaging.

the edge of the mouthpiece and forming a means for securing thediaphragm on the mouthpiece, said ring being provided with anattaching-screw bl; and the diaphragnru'emovably secured to thetransmitter bysaid ring. v

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

- WILLIAM M. BASHLIN. Witnesses D. U. ARmD, (l. E. BORDWELL.

